Definition

1. Noun:
   • A small wrist bone: The "os pisiforme" is one of the eight small carpal bones located in the wrist. It is distinguished by its pea-like shape and its specific articulation only with the triquetral bone (also called the triquetrum).

Usage Examples

• Noun:
  • The os pisiforme is the smallest carpal bone in the proximal row.
  • Fractures of the os pisiforme are relatively uncommon but can cause significant wrist pain.
  • During the anatomy exam, the student correctly identified the os pisiforme.

Advanced Usage

• Clinical Context: The term is primarily used in medical, anatomical, and clinical contexts.
  • The surgeon noted calcification near the os pisiforme on the X-ray.
• Comparative Anatomy: Used when discussing the skeletal structure across different species.
  • The os pisiforme is well-developed in many mammals, providing leverage for flexor tendons.

Variants and Related Words

• Pisiform bone: This is the more common English term synonymous with "os pisiforme." "Os" is Latin for "bone."
  • The pisiform bone acts as a sesamoid bone within the tendon of the flexor carpi ulnaris muscle.
• Triquetral bone / Triquetrum: The only carpal bone with which the os pisiforme articulates.

Synonyms

• Pisiform: Often used as a shorthand in medical notes.
  • Tenderness was noted over the pisiform.
• Pisiform bone: The full, common anatomical term.

Related Phrases

• Pisotriquetral joint: The specific joint formed between the os pisiforme and the triquetral bone.
  • Osteoarthritis of the pisotriquetral joint can mimic other wrist conditions.

Noun

1. a small wrist bone that articulates only with the triquetral